List questions from proof-explanation

Published on 01 Apr 2026 - 20:54

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Limits at Infinity and Existence

Published on 12 Apr 2026 - 22:47

57

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Which group isomorphism theorem is being used here?

Published on 13 Apr 2026 - 4:31

87

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How to finish the proof of this corollary of Hahn-Banach theorem?

Published on 07 Oct 2019 - 22:31

67

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Is it a typo in a corollary of Hahn-Banach theorem?

Published on 07 Oct 2019 - 23:38

366

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Derivative of inverse function (proof)

Published on 28 Mar 2026 - 2:48

97

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Graph has $3n$ vertices and every two has common neigbour. Show there is a dominant set with $n$ vertices.

Published on 08 Oct 2019 - 18:09

605

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Curves have finite automorphism group (proof by D. Litt)

Published on 28 Mar 2026 - 16:56

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Clarification on existential quantifier

Published on 10 Apr 2026 - 13:41

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Probability - How to prove that $E(X)=P(T) (E(X) +1)+P(HT)(E(X)+2)+P(HH)(2).$

Published on 09 Oct 2019 - 0:15

45

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Solve $a_{n+2}-4a_{n+1}-5a_{n}=0$ with $a_0=4$ and $a_1=2$ and prove by induction

Published on 06 Apr 2026 - 7:46

78

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Cross Product Identity

Published on 08 Apr 2026 - 22:42

58

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Is it a mistake in the proof of the proposition related to the Hahn-Banach theorem?

Published on 13 Apr 2026 - 0:31

94

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The set of singular points of the boundary of a convex body is meagre.

Published on 25 Mar 2026 - 19:07

132

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If $n$ is a positive integer such that $n=3j+2$ for some integer $j$, then $n\neq k^2$ for an integer $k$.

Published on 10 Oct 2019 - 0:12

List Question

Proof that $W^{m,p}(\Omega)$ is a reflexive space for $1 < p < \infty$

Limits at Infinity and Existence

Which group isomorphism theorem is being used here?

How to finish the proof of this corollary of Hahn-Banach theorem?

Is it a typo in a corollary of Hahn-Banach theorem?

Derivative of inverse function (proof)

Graph has $3n$ vertices and every two has common neigbour. Show there is a dominant set with $n$ vertices.

Curves have finite automorphism group (proof by D. Litt)

Clarification on existential quantifier

Probability - How to prove that $E(X)=P(T) (E(X) +1)+P(HT)(E(X)+2)+P(HH)(2).$

Solve $a_{n+2}-4a_{n+1}-5a_{n}=0$ with $a_0=4$ and $a_1=2$ and prove by induction

Cross Product Identity

Is it a mistake in the proof of the proposition related to the Hahn-Banach theorem?

The set of singular points of the boundary of a convex body is meagre.

If $n$ is a positive integer such that $n=3j+2$ for some integer $j$, then $n\neq k^2$ for an integer $k$.

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